risc-v/esp32c3: Implement up_perf_xxx API

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>

arch/risc-v/src/esp32c3/Make.defs

@@ -39,7 +39,7 @@ CHIP_CSRCS += esp32c3_irq.c
 CHIP_CSRCS += esp32c3_clockconfig.c esp32c3_gpio.c
 CHIP_CSRCS += esp32c3_lowputc.c esp32c3_serial.c
 CHIP_CSRCS += esp32c3_systemreset.c esp32c3_resetcause.c
-CHIP_CSRCS += esp32c3_uid.c
+CHIP_CSRCS += esp32c3_uid.c esp32c3_perf.c
 
 ifeq ($(CONFIG_ESP32C3_REGION_PROTECTION),y)
 CHIP_CSRCS += esp32c3_region.c

arch/risc-v/src/esp32c3/esp32c3_perf.c

@@ -0,0 +1,84 @@
+/****************************************************************************
+ * arch/risc-v/src/esp32c3/esp32c3_perf.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this args for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/clock.h>
+
+#include <stdint.h>
+#include <time.h>
+
+#include "esp32c3_attr.h"
+#include "riscv_internal.h"
+#include "hardware/esp32c3_system.h"
+#include "esp32c3_clockconfig.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NSEC_PER_CYCLE (1000 / CONFIG_ESP32C3_CPU_FREQ_MHZ)
+#define CYCLE_PER_SEC  (USEC_PER_SEC * CONFIG_ESP32C3_CPU_FREQ_MHZ)
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_perf_init
+ ****************************************************************************/
+
+void up_perf_init(void *arg)
+{
+  WRITE_CSR(CSR_PCER_MACHINE, 0x1);
+  WRITE_CSR(CSR_PCMR_MACHINE, 0x1);
+}
+
+/****************************************************************************
+ * Name: up_perf_gettime
+ ****************************************************************************/
+
+uint32_t IRAM_ATTR up_perf_gettime(void)
+{
+  return READ_CSR(CSR_PCCR_MACHINE);
+}
+
+/****************************************************************************
+ * Name: up_perf_getfreq
+ ****************************************************************************/
+
+uint32_t up_perf_getfreq(void)
+{
+  return CYCLE_PER_SEC;
+}
+
+/****************************************************************************
+ * Name: up_perf_convert
+ ****************************************************************************/
+
+void up_perf_convert(uint32_t elapsed, struct timespec *ts)
+{
+  ts->tv_sec  = elapsed / CYCLE_PER_SEC;
+  elapsed    -= (uint64_t)ts->tv_sec * CYCLE_PER_SEC;
+  ts->tv_nsec = elapsed * NSEC_PER_CYCLE;
+}

boards/risc-v/esp32c3/esp32c3-devkit/src/esp32c3_boot.c

@@ -24,6 +24,8 @@
 
 #include <nuttx/config.h>
 
+#include "riscv_internal.h"
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
@@ -49,6 +51,10 @@
 
 void esp32c3_board_initialize(void)
 {
+#ifdef CONFIG_SCHED_CRITMONITOR
+  up_perf_init(NULL);
+#endif
+
   /* Configure on-board LEDs if LED support has been selected. */
 
 #ifdef CONFIG_ARCH_LEDS